Quick Search:
Prog. Theor. Phys. Vol. 104 No. 6 (2000) pp. 1173-1187
Quantum Effects for the Neutrino Mixing Matrix in a Democratic-Type Model
Takahiro Miura,1,*
Eiichi Takasugi,1,** and
Masaki Yoshimura2,***
1Department of Physics,
Osaka University, Toyonaka 560-0043, Japan
2Department of Physics,
Ritsumeikan University, Kusatsu 525-8577, Japan
(Received July 13, 2000)
Abstract:
We investigate the quantum effects for
the democratic-type neutrino mass matrix given
at the right-handed neutrino mass scale mR in order to see
(i) whether the prediction θ23=-π/4 which is crucial
to explain the atmospheric neutrino anomaly is stable,
(ii) how θ12 and θ13 behave, and
(iii) whether the predicted Dirac CP phase δ
maintains maximal
size at
the weak scale mZ.
We find that
for the (inversely) hierarchical mass spectrum with m1∼m2,
θ23 and θ13 are stable,
while θ12 is not stable. This leads to the possibility that
the solar neutrino mixing angle can become large at mZ even if
it is taken to be small at mR.
We also show that δ maintains almost maximal size
for the above-mentioned mass spectrum,
and our model predicts a large CP violation effect in future
neutrino oscillation experiments in the case that
the solar neutrino puzzle
is explained by the large mixing angle MSW solution.
URL :
http://ptp.ipap.jp/link?PTP/104/1173/
DOI : 10.1143/PTP.104.1173
References:
- A. Mann, talk given at 19th International Symposium on Lepton and Photon Interactions at High Energies (LP 99), Stanford, CA, 9-14 August 1999;
hep-ex/9912007[e-print arXiv].
- Y. Suzuki, Ref. 1).
- Y. Suzuki, talk given at XIX International Conference on Neutrino Physics and Astrophysics (Neutrino 2000), Sudbury, Canada, 16 - 21 June 2000.
-
K. Fukuura, T. Miura, E. Takasugi and M. Yoshimura, Phys. Rev. D61 (2000), 073002[APS].
- T. Miura, E. Takasugi and M. Yoshimura, hep-ph/0003139 (to be published in Phys. Rev. D).
- C. Caso et al., Eur. Phys. J. C3 (1998), 1.
-
P. H. Chankowski and P. Pluciennik, Phys. Lett. B316 (1993), 312[Elsevier].
-
K. Babu, C. N. Leung and J. Pantaleone, Phys. Lett. B319 (1993), 191[Elsevier].
-
M. Tanimoto, Phys. Lett. B360 (1995), 41[Elsevier].
-
J. Ellis and S. Lola, Phys. Lett. B458 (1999), 310[Elsevier].
J. Ellis, G. K. Leontari, S. Lola and D. V. Nanopoulos, Eur. Phs. J. C9 (1999), 389.
-
J. A. Casas, J. R. Espinosa, A. Ibarra and I. Nabarro, Nucl. Phys. B556 (1999), 3[Elsevier]; B569 (2000), 82;
J. High Energy Phys. 09 (1999), 015[CrossRef];
Nucl. Phys. B573 (2000), 652[Elsevier].
-
R. Barbieri, G. G. Ross and A. Strumia, J. High Energy Phys. 10 (1999), 020[CrossRef].
- N. Haba, Y. Matsui, N. Okamura and M. Sugiura, Eur. Phys. J. C10 (1999), 677.
N. Haba and N. Okamura, Eur. Phys. J. C14 (2000), 347.
N. Haba, Y. Matsui, N. Okamura and T. Suzuki, hep-ph/0005064[e-print arXiv].
-
P. H. Chankowski, W. Krolikowski and S. Pokorski, Phys. Lett. B473 (2000), 109[Elsevier].
-
K. R. S. Balaji, A. S. Dighe, R. N. Mohapatra and M. K. Parida, Phys. Rev. Lett. 84 (2000), 5034[APS].
-
T. Miura, T. Shindou, E. Takasugi and M. Yoshimura, hep-ph/0005267[e-print arXiv].
-
V. Barger, S. Geer and K. Whisnant, Phys. Rev. D61 (2000), 053004[APS].
V. Barger, S. Geer, R. Raja and K. Whisnant, hep-ph/0003184[e-print arXiv].
Y. Kuno, in Proceedings of the Workshop on High Intensity Secondly Beam with Phase Rotation, September 1998.
Y. Kuno and Y. Mori, talk given at ICFA/ECFA Workshop “Neutrino Factories based on Muon Storage Ring", July 1999.
-
Z. Maki, M. Nakagawa and S. Sakata, Prog. Theor. Phys. 28 (1962), 870[PTP].
-
G. Altarelli and F. Feruglio, Phys. Lett. B439 (1998), 112[Elsevier];
J. High Energy Phys. 11 (1998), 021[CrossRef];
Phys. Lett. B451 (1999), 388[Elsevier].
-
M. Apollonio et al., Phys. Lett. B466 (1999), 415[Elsevier].
-
M. Doi, T. Kotani, T. Kurimoto, H. Nishiura and E. Takasugi, Phys. Rev. D37 (1988), 1923[APS].
